Field Wiring - LG ARUV140LTS4 Installation Manual

ELECTRICAL WIRING
60

Field Wiring

Single outdoor unit
Outdoor
Power supply
(3Ø 4wires)
(Main Switch)
Indoor
Power supply
(1Ø 2wires)
N
L
Pull Box
(Installer option)
Power cable
(2 Wires Cable)
WARNING
!
• Indoor Unit ground wires are required for preventing electrical shock accident during current
leakage, Communication disorder by noise effect and motor current leakage (without connec-
tion to pipe).
• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately
from the power supply.
• Install the main switch that can interrupt all the power sources in an integrated manner because
this system consists of the equipment utilizing the multiple power sources.
• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power
goes on and off while the product is operating, attach a reversed phase protection circuit locally.
Running the product in reversed phase may break the compressor and other parts.
[Heat Pump]
Between Indoor and Master Outdoor unit
SODU B SODU A IDU B IDU A INT B
3 4 3 4
[Outdoor Unit]
R S T N
Switch
Fuse
Power cable
(4 Wires Cable)
Power cable
(2 Wires Cable)
Pull Box
(Installer option)
Power cable
(2 Wires Cable)
Communication cable
(3 Wires Cable)
[Indoor Units]
Master
INT A
Outdoor Unit
3 4
Frequency
60Hz
50Hz
Communication cable
(2 Wires Cable)
Pull Box Pull Box
(Installer option) (Installer option)
Power cable Power cable
(2 Wires Cable) (2 Wires Cable)
The GND terminal at the main PCB is a '-' ter-
minal for day contact, it is not the point to
make ground connection.
Voltage range(V)
Outdoor Indoor
380V 220V
380-415V 220-240V